Snort mailing list archives
Re: finding which rule
From: Y M <snort () outlook com>
Date: Thu, 24 Jul 2014 20:03:14 +0000
Date: Thu, 24 Jul 2014 15:52:50 -0400 From: yawningdogge () gmail com To: snort-users () lists sourceforge net Subject: Re: [Snort-users] finding which rule I use pulledpork. 1. When you deployed Snort, did you copy all of the necessary files to the respective directories (so_rules, preproc_rules, etc.)?2. When you run Snort, from the run stats, under "Snort rules read", how many preprocessor rules are being loaded? A correction about my initial post, i said it is sid:2, I should have said sid:1 based on your alert data. On Thu, Jul 24, 2014 at 3:50 PM, Y M <snort () outlook com> wrote: Date: Thu, 24 Jul 2014 15:44:24 -0400 From: yawningdogge () gmail com To: snort-users () lists sourceforge net Subject: Re: [Snort-users] finding which rule My preprocessor.rules file is blank How did you copy/install your rules? On Thu, Jul 24, 2014 at 3:24 PM, Y M <snort () outlook com> wrote: Date: Thu, 24 Jul 2014 15:02:34 -0400 From: yawningdogge () gmail com To: snort-users () lists sourceforge net Subject: [Snort-users] finding which rule I'm getting a lot of alerts that look like this. [**] [129:20:1] Snort Alert [129:20:1] [**] [Classification: Potentially Bad Traffic] [Priority: 2] 07/24-14:15:35.196146 172.28.61.104:22 -> 172.28.61.88:20309 TCP TTL:64 TOS:0x10 ID:59076 IpLen:20 DgmLen:104 DF ***AP*** Seq: 0x8055FA2A Ack: 0x450C8A09 Win: 0x545 TcpLen: 20 How do I go about finding the rule that generated this alert? The "[129:20:1]" stands for [GID:SID:REV]. GID with value 129 is generated by the Stream5 preprocessor (http://manual.snort.org/node18.html), and the alert sid is 2. You can go with something similar to (assuming you are running *nix): grep "sid: 2; gid: 129" /your/pathto/preproc_rules/preprocessor.rules. Though you may not get the exact content match upon which this signature is matching but it has references to CVE/Bugtraq. In general, the alert warns about existing payload on a SYN packet, which may be categorized as unusual behavior; ie., sending data on the initial SYN. You need to investigate to determine if it is legit or not. The reason your alert is showing as "Snort Alert" instead of the actual signature message is that the sid-msg.map is not updated with the specific signature information. YM ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news! ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news! ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
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Current thread:
- finding which rule Richard Smollett (Jul 24)
- Re: finding which rule Y M (Jul 24)
- Re: finding which rule Richard Smollett (Jul 24)
- Re: finding which rule Y M (Jul 24)
- Re: finding which rule Richard Smollett (Jul 24)
- Re: finding which rule Y M (Jul 24)
- Re: finding which rule Richard Smollett (Jul 24)
- Re: finding which rule Y M (Jul 24)
- Re: finding which rule Richard Smollett (Jul 25)
- Re: finding which rule Joel Esler (jesler) (Jul 25)
- Re: finding which rule waldo kitty (Jul 25)
- Re: finding which rule Richard Smollett (Jul 24)
- Re: finding which rule Y M (Jul 24)